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This work refers to the performance of tensile tests on commercially available NiTi alloys, studying the mechanical characteristics up to the onset of the superelasticity effect and monitoring the test through 2 supporting techniques, adiabatic thermal emission and acoustic emission. Thermal response to monotonic loading was followed by applying thermistors and the stress wave propagation was detected with piezoelectric sensors. The main interest lies in the coupling the 2 monitoring techniques without changing test conditions, so that from their comparison more information could be gained. Thermal emission calls for a quasi-adiabatic environment during solicitation, while acoustic emission analysis, linked with stress propagation, is often not sufficiently exploited during a very fast load application. Results are promising as a preliminary assessment and could provide quality discrimination.

Additional information

Authors: LUCIA A C, JRC Ispra (IT);SANTULLI C, JRC Ispra (IT)
Bibliographic Reference: Paper presented: IV European Symposium on Martensitic Transformations, Enschede (NL), July 1-4, 1997
Availability: Available from (1) as Paper EN 40492 ORA
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